* {
  margin: 0;
  padding: 0;
}
.container{
  display: flex;
}
.editor {
  margin: 0 auto;
  width: 800px;
  height: 400px;
  border: 1px solid grey;
}
.schema{
  width: 800px;
  height: 400px;
  border: 1px solid blue;
}
.result{
  width: 800px;
  height: 400px;
  border: 1px solid pink;
}